Estimation of Cambridge Argillite Strength Based on Drilling Parameters

This paper presents the results from extensive laboratory strength testing of bedrock samples from the Boston, Massachusetts area, and provides correlations to drilling parameters recorded during the coring process. Results from unconfined compressive strength testing, splitting tensile strength testing (using the Brazilian test), and the point load test method were compared to the recorded drilling parameters and calculated compound parameters such as the Somerton Index and the Drilling Energy. The rocks tested were mostly Cambridge argillite with some diabase, basalt, and sandstone. The objective of this paper is to demonstrate that measurements while drilling (MWD) can provide designers of deep foundations with a better approximation of the strength of the bedrock matrix by correlating drilling parameters to more conventional laboratory test methods, and field measurements such as rock quality designation, with potential for more efficient, reliable, and cost-effective foundation designs.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 74-102
  • Monograph Title: Proceedings of the 66th Highway Geology Symposium (HGS 2015)

Subject/Index Terms

Filing Info

  • Accession Number: 01638286
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 21 2017 5:16PM